<template>
  <el-menu
    default-active="1-4-1"
    class="el-menu-vertical-demo"
    :collapse="isCollapse"
  >
    <h3>{{ isCollapse ? "后台" : "通用后台管理系统" }}</h3>
    <el-menu-item
      v-for="item in noChildren"
      :index="item.path"
      :key="item.path"
      @click="clickMenu(item)"
    >
      <i :class="'el-icon-' + item.icon"></i>
      <span slot="title">{{ item.label }}</span>
    </el-menu-item>

    <el-submenu
      v-for="item in hasChildren"
      :index="item.children.path + ''"
      :key="item.path"
    >
      <template slot="title">
        <i :class="'el-icon-' + item.icon"></i>
        <span slot="title">{{ item.label }}</span>
      </template>
      <el-menu-item-group
        v-for="(subItem, subIndex) in item.children"
        :index="subIndex.toString()"
        :key="subItem.path"
      >
        <el-menu-item @click="clickMenu(subItem)">
          {{ subItem.label }}
        </el-menu-item>
      </el-menu-item-group>
    </el-submenu>
  </el-menu>
</template>

<style lang="less" scoped>
.el-menu-vertical-demo:not(.el-menu--collapse) {
  width: 200px;
  min-height: 400px;
}
</style>

<script>
export default {
  data() {
    return {
      menu: [
        {
          path: "/",
          name: "home",
          label: "首页",
          icon: "s-home",
          url: "Home/index",
        },
        {
          path: "/mall",
          name: "mall",
          label: "商品管理",
          icon: "video-play",
          url: "Mall/Mall",
        },
        {
          path: "/user",
          name: "user",
          label: "用户管理",
          icon: "user",
          url: "User/User",
        },
        {
          label: "其他",
          icon: "location",
          children: [
            {
              path: "/page1",
              name: "page1",
              label: "头像管理",
              icon: "setting",
              url: "Other/PageOne",
            },
            {
              path: "/page2",
              name: "page2",
              label: "设置",
              icon: "setting",
              url: "Other/  ",
            },
          ],
        },
      ],
    };
  },
  methods: {
    clickMenu(item) {
      this.$router.push({
        name: item.name,
      });
      this.$store.commit("selectMenu", item);
    },
  },
  computed: {
    noChildren() {
      return this.menu.filter((item) => !item.children);
    },
    hasChildren() {
      return this.menu.filter((item) => item.children);
    },
    isCollapse() {
      return this.$store.state.tab.isCollapse;
    },
    aysncMenu() {
      return this.$store.state.tab.menu;
    },
  },
};
</script>

<style lang='less' scoped>
.el-menu {
  height: 100%;
  border: none;
  background-color: #545c64;
  // text-color: #fff;
  // active-text-color: #ffd04b;

  h3 {
    color: #fff;
    text-align: center;
    line-height: 48px;
  }
}
.el-submenu {
  border: none;
  background-color: #545c64;
}
</style>